Quarter	Percent
1978-01-01	35.9606552094335
1978-04-01	33.2203445869160
1978-07-01	33.6900826952407
1978-10-01	34.3337864608209
1979-01-01	35.7037594801919
1979-04-01	33.2314688280312
1979-07-01	33.3198429911084
1979-10-01	34.2421989187815
1980-01-01	35.8015640891169
1980-04-01	33.3012679206196
1980-07-01	33.2800443338267
1980-10-01	34.2611653662133
1981-01-01	35.5812643456799
1981-04-01	33.2101130944859
1981-07-01	33.5922589729696
1981-10-01	34.1181987056671
1982-01-01	35.3015104783282
1982-04-01	33.0861474691679
1982-07-01	33.6431873833632
1982-10-01	33.8059450254810
1983-01-01	34.5526006527532
1983-04-01	32.3577498290840
1983-07-01	32.7289943463200
1983-10-01	33.5338806073114
1984-01-01	34.9305553395911
1984-04-01	32.6016114650636
1984-07-01	32.7964889289551
1984-10-01	33.5467745198094
1985-01-01	34.8668317687608
1985-04-01	32.8773595962107
1985-07-01	33.1471593139731
1985-10-01	34.0507711882482
1986-01-01	35.0660073070321
1986-04-01	32.9900116188094
1986-07-01	33.2051384281020
1986-10-01	34.1350564909755
1987-01-01	35.2577824113795
1987-04-01	33.0360231978746
1987-07-01	33.3561711703241
1987-10-01	34.0278687655758
1988-01-01	35.1283084603659
1988-04-01	32.9926049911534
1988-07-01	33.2459917042995
1988-10-01	34.0631010422778
1989-01-01	34.9172471493074
1989-04-01	32.5787473421342
1989-07-01	32.9353664566861
1989-10-01	33.4344507817296
1990-01-01	34.2648716115272
1990-04-01	32.2004826633673
1990-07-01	32.4576914358942
1990-10-01	32.8785413251510
1991-01-01	33.6723460269898
1991-04-01	31.6576444362594
1991-07-01	31.8595112625320
1991-10-01	32.2593207402521
1992-01-01	33.2235604177356
1992-04-01	31.6459072822338
1992-07-01	31.9698434098646
1992-10-01	32.0647914137128
1993-01-01	33.5779356362834
1993-04-01	31.7739088865652
1993-07-01	32.0112807621704
1993-10-01	32.2749073955414
1994-01-01	33.5581260492308
1994-04-01	31.7190244738701
1994-07-01	32.1808632806491
1994-10-01	32.8266865179694
1995-01-01	33.7091974828576
1995-04-01	32.0603726729218
1995-07-01	31.9942822893068
1995-10-01	32.8250285340806
1996-01-01	33.7057194529656
1996-04-01	31.7781374830823
1996-07-01	31.6946511750789
1996-10-01	32.4916127185439
1997-01-01	33.0046595603167
1997-04-01	31.3268333676224
1997-07-01	31.5472390001133
1997-10-01	32.2990053535412
1998-01-01	33.0116851171108
1998-04-01	31.5169198530776
1998-07-01	31.9036060444244
1998-10-01	32.5581955015886
1999-01-01	33.3198700746668
1999-04-01	31.8536243617294
1999-07-01	32.1129359414323
1999-10-01	32.7135008103407
2000-01-01	33.6516390017281
2000-04-01	32.2407595237490
2000-07-01	32.4619650382092
2000-10-01	32.6090564557815
2001-01-01	33.4193373586035
2001-04-01	32.4427337527547
2001-07-01	32.7624334324284
2001-10-01	33.1080175004372
2002-01-01	34.0389678040679
2002-04-01	33.1308518981740
2002-07-01	33.1196091889778
2002-10-01	33.5373740942384
2003-01-01	34.3747170137190
2003-04-01	33.0501296508674
2003-07-01	33.3445583263263
2003-10-01	33.7180012096257
2004-01-01	34.4644176096562
2004-04-01	33.3568989966558
2004-07-01	33.2377629579657
2004-10-01	33.8618148361350
2005-01-01	34.3867647802157
2005-04-01	33.0697676244714
2005-07-01	32.9974062889271
2005-10-01	33.4813076190690
2006-01-01	34.0769953293919
2006-04-01	32.8289019236925
2006-07-01	32.8024539114674
2006-10-01	33.0923825639912
2007-01-01	33.7381260243444
2007-04-01	32.3055490154338
2007-07-01	32.6936766817680
2007-10-01	32.8102961279640
2008-01-01	33.5098796911005
2008-04-01	32.2048539701238
2008-07-01	32.6391946638194
2008-10-01	32.8807582162278
2009-01-01	33.2932147528211
2009-04-01	32.4183950744677
2009-07-01	32.5564818749069
2009-10-01	33.0612683260237
2010-01-01	33.2986988308722
2010-04-01	32.4455984941739
2010-07-01	32.4634209924930
2010-10-01	32.8032538791355
2011-01-01	33.2072385539021
2011-04-01	32.5358259624760
2011-07-01	32.9599559097933
2011-10-01	32.9393428030029
2012-01-01	33.4592910592190
2012-04-01	32.5767117278844
2012-07-01	32.7711987194841
2012-10-01	32.8728698479788
2013-01-01	32.9295273098318
2013-04-01	32.0125718918348
2013-07-01	32.1475946591738
2013-10-01	31.9996362443606
2014-01-01	32.5569869683108
2014-04-01	31.6088600463374
2014-07-01	31.6623472436241
2014-10-01	31.7381562251660
2015-01-01	32.0381062418128
2015-04-01	31.3996647702661
2015-07-01	31.2061787005226
2015-10-01	31.2917224025162
2016-01-01	31.4291297725789
2016-04-01	30.6033562650977
2016-07-01	30.3101499499322
2016-10-01	30.3060856330475
2017-01-01	30.8141957890708
2017-04-01	29.7287811973030
2017-07-01	29.4871499725058
2017-10-01	29.5786112703095
2018-01-01	29.3753833108544
2018-04-01	28.2983683413606
2018-07-01	28.1873254647330